Periodograms of the radial velocity residuals for HD 112863 (top) and HD 206505 (bottom) after the brown dwarf companion radial velocity signal has been fitted as shown in Figs. 2 and 3. The black horizontal lines correspond to the 1% (bottom) and 0.1% (top) FAPs and demonstrate that there are no other significant radial velocity signals in the data, ruling out the possibility of additional companions in either system.